What Is the Force of Air Resistance and Friction Acting on a Diver?

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SUMMARY

The discussion focuses on calculating the average force of air resistance acting on a 57.0 kg diver who dives from a height of 15.0 m and reaches a speed of 14.0 m/s before entering the water. The relevant equation used is the conservation of energy, represented as Ek + Ep = Etot. The diver's speed without air resistance can be determined by applying the acceleration due to gravity (g). Additionally, the force of friction underwater is calculated considering the buoyant force of 500 N acting on the diver.

PREREQUISITES
  • Understanding of Newton's laws of motion
  • Familiarity with the concepts of kinetic energy (Ek) and potential energy (Ep)
  • Knowledge of the conservation of energy principle
  • Basic calculations involving forces and buoyancy
NEXT STEPS
  • Calculate the average force of air resistance using the energy conservation equation
  • Determine the diver's speed without air resistance using gravitational acceleration
  • Analyze the forces acting on the diver underwater, including buoyancy and friction
  • Explore the impact of varying heights on the diver's speed and air resistance
USEFUL FOR

Students studying physics, particularly those focusing on mechanics and forces, as well as educators looking for practical examples of energy conservation and force calculations.

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Homework Statement



A 57.0 kg diver dives from a height of 15.0 m. She reaches a speed of 14.0 m/s just before entering the water. What was the average force of air resistance (e.g., friction) acting on the diver?
Bonus: What is the force of friction underwater if she reaches a depth of 2.5 m before stopping? Do not neglect the buoyant force of 500 N acting on the diver once underwater

Homework Equations



Ek + Ep = Etot

The Attempt at a Solution



0.5mv^2 + mgh = ?


i don't understand how i can find air resistance, maybe I am using the wrong equation??
 
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what would be the divers speed if there was no air resistance using the fact that acceleration = g
 

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